<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div{
				width: 300px;
				height: 300px;
				border-top: #FF0000 5px dotted;
				border-right: yellow 10px dashed;
				border-bottom: blue 15px solid;
				border-left: gray 20px double;
				margin: 5px 10px 15px 20px;
				padding: 20px 15px 10px 5px;
			}
		</style>
	</head>
	<body>
		<div>这是内容</div>
	</body>
</html>
